An experimental study of sapped drainage network development
An experimental study of sapped drainage network development
复制标题
抽水排水管网建设试验研究
DOI：
10.1002/esp.3290170506
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发表时间：
1992
影响因子：
3.3
通讯作者：
Victor T. Mullen
中科院分区：
文献类型：
--
作者：
B. Gomez;Victor T. Mullen
在河床上发育的盆地中，流出的地下水流支撑着一个由水头增长、横向加宽和分水岭衰退共同演变的河道网络。发展中的网络所占的面积随着时间的推移而增加。循环性被用来刻画网络演化的三个阶段(初始、扩展和抽象)。流域输沙量随时间呈指数递减。明显的准周期变化叠加在这一总趋势之上。有些变化与提供给河道的泥沙数量的变化直接相关。平均网络产沙量(以网络面积表示的平均输沙量)随时间的变化充分描述了网络演变过程中输沙量的总体下降。
In a basin developed on a stream table, effluent subsurface flow supported a channel network that evolved by a combination of headward growth, lateral widening and divide decay. The area occupied by the developing network increased with time. Circularity was used to characterize network evolution which occurred in three phases (initiation, extension and abstraction). Basin sediment discharge declined exponentially with time. Pronounced quasi-cyclic variability was superimposed upon this general trend. Some of the variability was directly linked to changes in the amount of sediment supplied to the channel. The variation of mean network sediment yield (mean sediment discharge scaled by network area) with time adequately described the general decline in sediment discharge as the network evolved.